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Subject :IMO    Class : Class 7

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Subject :IMO    Class : Class 9

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Subject :IMO    Class : Class 7

A number consists of two digits whose sum is 9. If 27 is added to the number, its digits are interchanged. Which of the given steps is CORRECT to find the number?
Step 1 :Let the unit’s digit be x
Step 2 :Then, ten’s digit = (9 – x)
∴ Number = 10 × (9 – x) + x
⇒ 90 – 10x + x = (90 – 9x)
Step 3 :Adding 27 to the number 90 – 9x, we get 117 – 9x
Step 4 :Number with digits interchanged is 10x + (9 – x) = 9x + 9
Step 5 :117 – 9x = 9x + 9
Step 6 :Therefore unit’s digit = 6 and ten’s digit = 3
Step 7 :Hence the number = 36.

A Only Step 4
B Both Step 1 and Step 2
C Step 1, 2, 3 and 4
D All steps are correct


how to find the solution

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Subject :IMO    Class : Class 5

Ans 1: (Master Answer)

Class : Class 1

(B):

(a) Total number of books in both  the libraries = 284683 + 371805
= 656488

(b) Number of more books in second library than the  first library = 371805 - 284683
= 87122


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Subject :IMO    Class : Class 5

Ans 1: (Master Answer)

Class : Class 1

(C): Quantity of syrup Mrs. Preeti had = 5 litres = 5000 ml

Quantity of Syrup she poured in each bottle = 300 ml

Number of bottles needed = 5000 ÷ 300 = 16.67
Therefore, 17 bottles are needed. 


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Subject :IMO    Class : Class 2

Study the timings of daily activities of Payal as shown in the table and fill in the blanks.

• Activities that last for 1 hour in total are ___P___ and ___Q___.
• The activity that lasted for 15 minutes only is ___R___.

AP-Reading Book Q-Playing Football R-Reading Book
BP-Playing Football Q-Reading Book R-Dance Practice
CP-Playing Football Q-Reading Book R-Painting
DP-Doing Homework Q-Playing Football R-Reading Book


Ans 1: (Master Answer)

Class : Class 1

(C):

  • Time duration for playing football = 30 minutes

           Time duration for reading book = 30 minutes
           So, activities that last for 1 hour in total are
           playing football and reading book.

  • The activity that lasted for 15 minutes only is painting.

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Subject :IMO    Class : Class 1

Ans 1:

Class : Class 2
D

Ans 2:

Class : Class 2

Ans 3:

Class : Class 2

Ans 4:

Class : Class 2
D

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Subject :IMO    Class : Class 7

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Subject :IMO    Class : Class 8

Ans 1:

Class : Class 8
A

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Subject :IMO    Class : Class 8

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